Efeito da desinfecção em microondas sobre a microinfiltração na interface de resinas para base e reembasamento de prótese
Effect of microwave disinfection on the microleakage at the interface of hard chairside reline resins and denture base resin
Jorge, J.H.; Giampaolo, E.T.; Vergani, C.E.; Machado, A.L.; Pavarina, A.C.; Rodrigues, M.G.
Rev. odontol. UNESP, vol.36, n3, p.261-266, 2007
Resumo
Este estudo avaliou o efeito da desinfecção em microondas (650 W/6 minutos) sobre a microinfiltração na interface de união de três reembasadores e três resinas para base de prótese. Amostras (12 x 3 x 3 mm) de resina Lucitone 550, Acron MC e QC 20 foram reembasadas com os materiais Kooliner, Tokuyama Rebase Fast II, Ufi Gel Hard, Lucitone 550, Acron MC e QC 20 (n = 20). A microinfiltração foi avaliada após 48 horas de armazenamento em água a 37 °C (G2A), após dois ciclos de desinfecção em microondas (G2M), após sete ciclos de desinfecção em microondas (G7M) e após sete dias de armazenamento em água a 37 °C (G7A). Posteriormente, todas as amostras foram imersas em solução de nitrato de prata a 50% por 24 horas. O sistema de análise de imagens Leica Qwin foi utilizado para determinar a microinfiltração na interface de união entre os materiais. Os dados foram analisados pelos testes de Kruskal Wallis e Fisher ao nível de 95% de significância. Pela análise dos resultados concluiu-se que não foi observada diferença significante entre os grupos analisados. A desinfecção em microondas não influenciou a microinfiltração.
Palavras-chave
Infiltração, reembasamento de dentadura, desinfecção, dentadura
Abstract
This study investigated the effect of microwave disinfection (650 W/6 min) on the microleakage at the interface of three hard chairside reline resins and three denture base resins. Rectangular bars (12 x 3 x 3 mm) of Lucitone 550, Acron MC and QC 20 were made and relined with Kooliner, Tokuyama Rebase Fast II and Ufi Gel Hard, Lucitone 550, Acron MC and QC 20 resins (n = 20). The microleakage was performed after 48 hours storage in water at 37°C (G2A), after two cycles of microwave disinfection (G2M), after seven cycles of microwave disinfection (G7M) and after 7 days storage in water at 37°C (G7A). Subsequently, all specimens were immersed in 50% silver nitrate solutions for 24 hours. Leica Qwin image analysis software was used to determine microleakage at the interface of the materials Data were analyzed using the Kruskal-Wallis and Fisher tests at a 95% significance level. It can be concluded that no significant difference was noted between the groups. Microwave disinfection had no effect on the microleakage.
Keywords
Microleakage, denture rebasing, denture disinfection, denture
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